Variability and distribution of parasites, pathologies and their effect on wild mussels (Mytilus sp) in different environments along a wide latitudinal span in the Northern Atlantic and Arctic Oceans

Benito, Denis; Paleček, Dragana; Lekube, Xabier; Izagirre, Urtzi; Marigómez, Ionan; Zaldibar, Beñat; Soto, Manu

doi:10.1016/j.marenvres.2022.105585

Cited by 6 publications

(11 citation statements)

References 39 publications

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“…Granulocytomas are associated with more severe inflammatory responses than hemocytic infiltrations because they can replace large portions of connective tissue (Bignell et al 2008) and lead to vascular occlusion (Lowe and Moore 1979). Granulocytomas have been related to chronic stress, and high prevalence may indicate a pathological condition that can lead to mortality in some bivalves (Benito et al 2022). Oocyte alterations have also been associated with exposure to pollutants.…”

Section: Discussionmentioning

confidence: 99%

Histopathological alterations in the gonads of wild white clams Dosinia ponderosa inhabiting a former copper mine locality in the Gulf of California

Eraso‐Ordoñez,

Yee‐Duarte,

Roldán‐Wong

et al. 2023

J Aqua Anim Hlth

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Objective Prolonged exposure to heavy metals, such as Pb, Hg, or Cu, has multiple adverse effects on marine organisms at the cellular, physiological, and population levels. Bivalves' histopathology provides a sensitive biomarker of pollutant‐induced stress and environmental health. Gonad tissue deterioration is of particular concern, as it affects the reproductive success of a species. This study aimed to examine the histopathological alterations caused by metal exposure in the gonad of the white clam Dosinia ponderosa. Methods Organisms were sampled from three locations in the Gulf of California: Santa Rosalia (SR), a former Cu mining town; San Lucas beach (SL), a nearby site influenced by pollution; and Escondida beach (EB), which served as a control site. Histological and histochemical stains were used, and the prevalence and intensity level of each alteration were calculated. Result The prevalence of alterations was higher in the ovaries of SR clams (92% compared to 60% in SL clams and 32.7% in EB clams), during spawning (91.4% compared to 20% in SL clams and 4.7% in EB clams), and in winter (93.5% compared to 30% in SL clams and 17.4% in EB clams). Conclusion These findings suggest a significant deterioration in the gonads of white clams from SR, probably linked to the chronic exposure to high concentrations of Cu and possibly other heavy metals; hence, the reproductive health of the clams is likely compromised.

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Section: Discussionmentioning

confidence: 99%

Histopathological alterations in the gonads of wild white clams Dosinia ponderosa inhabiting a former copper mine locality in the Gulf of California

Eraso‐Ordoñez,

Yee‐Duarte,

Roldán‐Wong

et al. 2023

J Aqua Anim Hlth

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“…Although they hypothesized that the presence of parasites is an aetiological factor for pearl formation, they did not present any evidence. Thus, as suggested by Benito et al (2022), it seems clear that the importance of parasitological studies for the health status assessment of mussels is critical. Co-occurrence of pearl formation and Gymnophalidae infection has been recently observed in Mediterranean mussels (Puljas and Burazin, 2022;Marchiori et al, 2023).…”

Section: Discussionmentioning

confidence: 99%

“…The rest of the histological procedure was carried out as indicated in Benito et al . ( 2022 ). Frozen mussels and paraffin blocks were stored in the Biscay Bay Environmental Biospecimen Bank.…”

Section: Methodsmentioning

confidence: 99%

“…Among the factors which drive mussel population dynamics, parasitism can play an important role (Thieltges, 2006 ). Consequently, parasitological studies have been widely performed with the aim of investigating the prevalence and pathology of parasitic infections (Villalba et al ., 1997 ; Özer and Güneydağ, 2015 ; Vázquez et al ., 2020 ; Benito et al ., 2022 ).…”

Section: Introductionmentioning

confidence: 99%

“…In early autumn 2016 and late summer 2017, alleged gymnophallid metacercariae were observed together with pearls in the mantle of mussels collected in Iceland and Tromsø (Benito et al ., 2022 ). The aim of the present study was to identify the trematode species corresponding to metacercariae found in mussels collected from Tromsø at morphological and molecular levels, and analyse the relationship between the gymnophallid parasite and the biological material encapsulated inside the pearls.…”

Section: Introductionmentioning

confidence: 99%

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Molecular confirmation of pearl formation in arctic mussels (Mytilus edulis) caused by Gymnophallus bursicola (Odhner 1900) metacercariae

Benito,

Izagirre,

Lekube

et al. 2023

Parasitology

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In recent field studies, suspected gymnophallid metacercariae were histologically located in the mantle of mussels from the Norwegian Sea. Mussels from the sites in which that infection was detected also presented abnormally high pearl numbers. It has been previously described that gymnophallid metacercariae could cause pearl formation processes in mussels, as a host reaction to encapsulate these metacercariae. Given the pathological host reaction these parasites elicit, a study was performed to identify gymnophallid metacercariae found in mussels collected from Tromsø at morphological and molecular level and to assess, by the use of molecular tools, the relationship between the parasite and the biological material inside the pearls. As a result, Gymnophallus bursicola metacercariae infecting Norwegian Mytilus edulis were identified according to morphological characters, along with the first 18S rDNA and COI sequences for this trematode species. In addition, parasite DNA from the core of the pearls was extracted and amplified for the first time, confirming the parasitological origin of these pearls. This procedure could allow identifying different parasitic organisms responsible for the generation of pearls in bivalves.

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First record of mussel larvae occurring in the mantle cavity of littoral-dwelling Mytilus spp. in Svalbard, Arctic

Olenin,

Minchin,

Samuilovienė

et al. 2024

Polar Biol

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After a millennium, the blue mussels Mytilus have returned to the high Arctic region of Svalbard in the beginning of 21st century. Later it was found that not only M. edulis arrived in Svalbard, but a whole complex of sympatric species including M. edulis, M. galloprovincialis, M. trossulus and their hybrids, which may have a wide range of origins from both sides of the North Atlantic. The mussels, which rst were found in the sublittoral at the mouth of Isfjorden on the west coast of Spitsbergen island, now are spreading in other areas, and recently were also found in the intertidal zone. Here we report on the nding of viable larvae at the late stages of development (up to pediveliger) that were recovered from the mantle cavity of mussels collected from the lower intertidal shore in late July 2019 and 2021 in Trygghamna, Isfjorden, Spitsbergen. Both the identity of the adult mussels and the larvae was con rmed using by sequencing of barcode region. Larvae ranged in size from 178 to 376 µm, averaging 295 ± 35 µm. They were recovered from mussel specimens ranging from 21 to 57 mm in length, and their ages were estimated, based on the number of rings, from 3 to 12 years. It remains unclear whether the retention of larvae within the mantle cavity results from the intake of near shore concentrations and whether it leads to larviphagy. HighlightsAn intertidal population of the blue mussels (Mytilus complex) found on the west coast of Svalbard, ArcticThe size of mussels ranged within 21-57 mm, with ages from 3 to 12 years Late-stage larvae were found in the mussel's mantle cavityThe species identity of adult mussels and larvae was con rmed by genetic methods.The presence of the pediveliger stage in the mantle cavity recorded in late July of 2019 and 2021.

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Variability and distribution of parasites, pathologies and their effect on wild mussels (Mytilus sp) in different environments along a wide latitudinal span in the Northern Atlantic and Arctic Oceans

Cited by 6 publications

References 39 publications

Histopathological alterations in the gonads of wild white clams Dosinia ponderosa inhabiting a former copper mine locality in the Gulf of California

Histopathological alterations in the gonads of wild white clams Dosinia ponderosa inhabiting a former copper mine locality in the Gulf of California

Molecular confirmation of pearl formation in arctic mussels (Mytilus edulis) caused by Gymnophallus bursicola (Odhner 1900) metacercariae

First record of mussel larvae occurring in the mantle cavity of littoral-dwelling Mytilus spp. in Svalbard, Arctic

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